handle money move without To homie

app/controllers/money_moves_controller.rb

@@ -17,6 +17,9 @@ class MoneyMovesController < ApplicationController
     else
       error_response(:bad_request)
     end
+
+  rescue StandardError
+    error_response(:bad_request)
   end
 
   def money_move_params

app/models/money_move.rb

@@ -4,13 +4,15 @@ class MoneyMove < ApplicationRecord
   def self.create_move(params)
     return false unless valid_money_move?(params)
 
-    move_from = create_move_from(params) if double_money_move?(params)
-    move_to = create_move_to(params)
+    move_from = create_move_from(params) if params[:from_homie_id].present?
+    move_to = create_move_to(params) if params[:to_homie_id].present?
 
     MoneyMove.transaction do
       move_from.save! if move_from.present?
-      move_to.save!
+      move_to.save! if move_to.present?
     end
+
+    true
   end
 
   def self.create_settle_record(homie_id, amount)
@@ -27,24 +29,27 @@ class MoneyMove < ApplicationRecord
     private
 
     def valid_money_move?(params)
-      params[:amount].present? && params[:to_homie_id].present?
-    end
-
-    def double_money_move?(params)
-      params[:from_homie_id].present? && params[:to_homie_id].present?
+      params[:amount].present? && (params[:to_homie_id].present? || params[:from_homie_id].present?)
     end
 
     def from_source_name(params)
-      if double_money_move?(params)
+      if params[:from_homie_id].present?
         Homie.find(params[:from_homie_id]).name
       else
         'External'
       end
     end
 
+    def to_source_name(params)
+      if params[:to_homie_id].present?
+        Homie.find(params[:to_homie_id]).name
+      else
+        'External'
+      end
+    end
+
     def create_move_from(params)
-      to_homie_name = Homie.find(params[:to_homie_id]).name
-      new_desc = "[#{to_homie_name}] #{params[:description]}".lstrip
+      new_desc = "[#{to_source_name(params)}] #{params[:description]}".lstrip
       MoneyMove.new(
         homie_id: params[:from_homie_id],
         amount: -params[:amount].to_d,